Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities
Net income	$ 56,547	$ 57,334
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation of property, plant and equipment	75,243	79,606
Other amortization	11,965	2,149
Provision for loan losses	7,105	6,349
Loans receivable originated and purchased, held for sale	(64,028)	(136,197)
Proceeds from sale of loans receivable, held for sale	71,829	167,583
Changes in deferred income taxes	39,051	(2,381)
Changes in excess tax benefits from share-based payment arrangements	(55)	97
Allowance for equity funds used during construction	(2,561)	(3,620)
Decrease in cash overdraft	(2,305)	(302)
Changes in assets and liabilities
Increase in accounts receivable and unbilled revenues, net	(52,537)	(25,012)
Increase in fuel oil stock	(6,509)	(49,759)
Decrease (increase) in accounts, interest and dividends payable	(41,989)	1,359
Changes in prepaid and accrued income taxes and utility revenue taxes	8,333	(30,699)
Changes in other assets and liabilities	(44,908)	11,732
Net cash provided by operating activities	55,181	78,239
Cash flows from investing activities
Available-for-sale investment and mortgage-related securities purchased	(193,119)	(379,896)
Principal repayments on available-for-sale investment and mortgage-related securities	161,526	203,783
Proceeds from sale of available-for-sale investment securities	2,066
Net decrease (increase) in loans held for investment	(104,824)	61,017
Proceeds from sale of real estate acquired in settlement of loans	3,977	2,118
Capital expenditures	(89,088)	(76,659)
Contributions in aid of construction	8,153	9,430
Other	(2,911)	(10)
Net cash used in investing activities	(214,220)	(180,217)
Cash flows from financing activities
Net increase (decrease) in deposit liabilities	79,577	(57,226)
Net increase (decrease) in short-term borrowings with original maturities of three months or less	(24,923)	13,023
Net increase (decrease) in retail repurchase agreements	1,803	(41,112)
Proceeds from issuance of long-term debt	125,000
Repayment of long-term debt	(50,000)
Changes in excess tax benefits from share-based payment arrangements	55	(97)
Net proceeds from issuance of common stock	12,071	10,789
Common stock dividends	(47,331)	(46,246)
Preferred stock dividends of subsidiaries	(946)	(946)
Other	(172)	(1,805)
Net cash provided by (used in) financing activities	95,134	(123,620)
Net decrease in cash and cash equivalents	(63,905)	(225,598)
Cash and cash equivalents, beginning of period	330,651	503,922
Cash and cash equivalents, end of period	$ 266,746	$ 278,324

The net changes in cash flows resulting from increase (decrease) on account of prepaid and accrued income taxes and utility revenue taxes.

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The increase (decrease) in retail repurchase agreements, during the period.

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The net cash inflow (outflow) resulting from principal repayments on investment and mortgage-related securities.

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The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

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The increase (decrease) during the reporting period in cash and cash equivalents. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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The sum of cash and cash equivalents plus Federal Funds Sold. Cash and cash equivalents consist of short term, highly liquid investments that are readily convertible to known amounts of cash and are so near their maturity that they present negligible risk of changes in value due to changes in interest rates -- usually with an original maturity less than 90 days.

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The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element represents the cash inflow reported in the enterprise's financing activities.

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Reductions in the entity's income taxes that arise when compensation cost (from non-qualified equity-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements. This element reduces net cash provided by operating activities.

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The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

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The net cash inflow or outflow for the increase (decrease) in the beginning and end of period deposits balances.

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The increase (decrease) during the reporting period in the value of fuel held in inventory.

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The increase (decrease) during the reporting period in other assets used in operating activities less other operating liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets and liabilities, other noncurrent assets and liabilities, or a combination of other current and noncurrent assets and liabilities.

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The change in cash during the period due to the net increase or decrease in outstanding checks, the liability that represents checks that have been issued but that have not cleared. The entity may classify these cash flows as financing or operating activities. Another element, Increase (Decrease) in Outstanding Checks, Financing Activities, represents cash flows from outstanding checks classified as financing activities.

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The increase (decrease) during the reporting period in the total amount due within one year (or one operating cycle) from all parties, associated with underlying transactions that are classified as operating activities.

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The net cash inflow or outflow from financing activity for the period.

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The net cash inflow or outflow from investing activity.

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The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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The aggregate amount of cash outflow for loans purchased and created with the intention to resell them in the near future.

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The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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The cash outflow from the distribution of an entity's earnings in the form of dividends to common shareholders.

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The cash outflow for the return on capital for noncontrolled interest in the entity.

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The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.

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